Part of salad board in actor's space (8,4)
I believe the answer is:
dressing room
'part of salad board' is the definition.
'dressing room' can be an answer for 'board' (thesaurus). I'm unsure of the 'part of salad' bit.
'actor's space' is the wordplay.
'actor's' becomes 'dressing' (I can't explain this - if you can you should believe this answer much more).
'space' becomes 'room' (enough space or room to do something).
'dressing'+'room'='DRESSING-ROOM'
'in' is the link.
Can you help me to learn more?
(Other definitions for dressing room that I've seen before include "Place to change or store clothes" , "Feature of a posh address" , "Changing cubicle" , "Where actors change" .)